Specifications - Lord and Son Construction, Inc.

PART 3
EXECUTION
3.1 INSTALLATION
Electrical installations shall conform to IEEE C2, NFPA 70, and to the
requirements specified herein.
3.1.1 Lamps
Lamps of the type, wattage, and voltage rating indicated shall be delivered
to the project in the original cartons and installed just prior to project
completion. Lamps installed and used for working light during construction
shall be replaced prior to turnover to the Government if more than 15
percent of their rated life has been used. Lamps shall be tested for
proper operation prior to turn-over and shall be replaced if necessary with
new lamps from the original manufacturer. Provide 10 percent spare lamps
of each type from the original manufacturer.
3.1.2 Lighting Fixtures
Set lighting fixtures plumb, square, and level with ceiling and walls, in
alignment with adjacent lighting fixtures, and secure in accordance with
manufacturers' directions and approved drawings. Installation shall meet
requirements of NFPA 70. Mounting heights specified or indicated shall be
to the bottom of fixture for ceiling-mounted fixtures and to center of
fixture for wall-mounted fixtures. Obtain approval of the exact mounting
for lighting fixtures on the job before commencing installation and, where
applicable, after coordinating with the type, style, and pattern of the
ceiling being installed. Recessed and semi-recessed fixtures shall be
independently supported from the building structure by a minimum of four
wires or straps or rods per fixture and located near each corner of each
fixture. Ceiling grid clips are not allowed as an alternative to
independently supported light fixtures. Round fixtures or fixtures smaller
in size than the ceiling grid shall be independently supported from the
building structure by a minimum of four wires or straps or rods per fixture
spaced approximately equidistant around the fixture. Do not support
fixtures by ceiling acoustical panels. Where fixtures of sizes less than
the ceiling grid are indicated to be centered in the acoustical panel,
support such fixtures independently and provide at least two 3/4 inch metal
channels spanning, and secured to, the ceiling tees for centering and
aligning the fixture. Provide wires or straps or rods for lighting fixture
support in this section. Lighting fixtures installed in suspended ceilings
shall also comply with the requirements of Section 09 51 00 ACOUSTICAL
CEILINGS.
3.1.3 Suspended Fixtures
Suspended fixtures shall be provided with 45 degree swivel hangers so that
they hang plumb and shall be located with no obstructions within the 45
degree range in all directions. The stem, canopy and fixture shall be
capable of 45 degree swing. Pendants, rods, or chains 4 feet or longer
excluding fixture shall be braced to prevent swaying using three cables at
120 degree separation. Suspended fixtures in continuous rows shall have
internal wireway systems for end to end wiring and shall be properly
aligned to provide a straight and continuous row without bends, gaps, light
leaks or filler pieces. Aligning splines shall be used on extruded
aluminum fixtures to assure hairline joints. Steel fixtures shall be
supported to prevent "oil-canning" effects. Fixture finishes shall be free
of scratches, nicks, dents, and warps, and shall match the color and gloss
SECTION 26 51 00 Page 12